1776, from Fr. oriol, O.Prov. auriol, from L. aureolus "golden," from PIE *aus- "gold." Originally in ref. to the Golden Oriole (Oriolus galbula), a bird of black and yellow plumage that summers in Europe (but is uncommon in England). Applied from 1791 to the unrelated but similarly colored Amer. species Icterus baltimore.